Meaning: Enter a competition or sit an exam
Example: He WENT IN FOR the photography prize, but didn't win.
Meaning: Support, advocate
Example: I don't GO IN FOR the claims being made about blogging.
Meaning: Like, have an interest in
Example: He GOES IN FOR classical music.
Meaning: Make a career choice
Example: Have you thought about GOING IN FOR teaching?
We have 55 phrasal verbs with 'GO'